Compound two-stage turbine.



C. T. COE.

COMPOUND TWO STAGE TURBINE. APPLICATION FILED MAR. 6, 191a.

Patented Apia 22,1919.

1,301,387. 2 SHEETS-SHEET I.

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WWM 6W4 c. T. COE. CQMPOUND TWO STAGE TURBINE.

APPLICATION FILED MAR. 6. I916.

Patented Apr. 22

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CHARLES T. 00E, 0E KEARNEY, iiiEw JERSEY.

, oomrounn TWO-STAGE TURBINE.

1,301,387. 7 Application filed March 6,

To all whom it may concern: a

.Be it known that I, CHARLES T. Con, a citizen of the United States, and resident of Kearney, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Compound Two-Stage Turbines, of which the following is a specification.

This invention relates to a compound two stage turbine. The drawings represent the turbine with a fan blower for the purpose of explanation.

.Figure 1 represents a front elevation of the turbine with apartial section as on the line 1, 1, of Fig. 2; Fig. 2' shows a section as on the line 2, 2 of Fig. 1; Fig. 3 shows a fragmentary longitudinal section of a modification of the turbiney'Fig. 4 shows a section as on the line 4, 4 of Fig. 3; Fig. 5 is a section as on the line 5, 5 of Fig. 1; Fig. 6 shows a section as on the line 6, 6, of Fig. 1 and Fig. 7 shows apartial section as on the line 7, 7 of Fig. 4. I

The casing of a turbine is cup shaped'and is indicated in its entirety by the numeral 20. The rear wall 21 of the casing has formed therewith theconcaved portion 22. The casing 20 has extending fromits outer circumferential surface the pairs of nozzle supports 24 and25 the'longitudinal axes of which are tangential to a circle passing through the middle. portion of the outer row of buckets to be described. Valve chambers 26 are formed at the upper ends of the sup- I ports 24 25. Nozzles 27 are located in the supports 24 and 25 and the upper ends of said nozzles form the valve seats 28. A valve casing 30 is in threaded engagement with the upper end of each support 24 and carries a valve spindle 31 for the needle valve 32. A hand wheel 33 is supported at the upper end of the spindle 31. The valve chambers 26 of each pair of nozzle supports 24 and 25 are connected by the con nee-ting conduit 36. The valve chambers 26 of the nozzle supports 24' are connected by the piping 38, which'has extending therefromthe main inlet pipe 40 with the. inlet valve 41. j

An exhaust cavity 42is formed with the casing. 20 and has extending therefrom at one side the exhaust pip'ing 43 and at the othenside'jis attached' the relief valve 44. A foot'45 with theflange 46 extends from the lowerportion of'the rear wall 21.v Lugs Specification of'Letters Patent.

Patented Apr.22,1919.

1916. Serial No. 82,368.

47 extend from the cylindrical surface of the casing 21. The depressed portion 22 of the rear wall 21 has extending outwardly therefrom the sleeve 48 and the latter has formed therewith the vacuum or exhaust chamber 50. On the inner face of the rear wall 21 of the casing is formed an annular lug 51 that supports a row of stationary buckets to be described.

The shaft of the turbine is indicated at 55 with the collar 56. A gland 57 with the flange 58 and made of a soft alloy, preferably what is commercially known as Allen metal is carried on the shaft 55 and one end abuts against the collar 56. A slot 59 is formed in the gland 57 and a pin in the shaft 55 engages said slot so that the gland 57'willrotate with the shaft 55. An annular collar 60 is fastened in acavity in said depressed portion 22 over the gland 57. A tight joint is made between the abutting surfaces of the gland 57v and the collar 56. A clearance of about one thousandth of an inch is made between the collar 60 and the gland '57. Against the shoulder 61 of the shaft55 there abuts a gland 62 similar to 57 and which forms a tight joint with the wall 63 of the sleeve 48. A ball bearing cage 68 abuts with one end face against the accompanying end of the gland Ball bearings 69 are carried in said cage; A spacing ring 70 is located in the sleeve 48 between the gland 62 and the cage 68. One thousandth of an inch clearance is provided between the gland62 and the spacing ring 70. A screw gland 72 is in threaded engagement with the sleeve 48,and has formed therewith the annular groove 7 3 for the fibrous packing 74. The sleeve 48 with the gland 72 forms a stuffing box for the shaft 55. A sleeve 75 is tightly secured to'the shaft of the turbine and at one end abuts against the cage 68. A grease cup 76 is secured in an opening 77 in the sleeve 48, and the said opening extends to the sleeve 75.; Apipe 80 extends from the upper end of the chamber 50 and which has connected thereto the piping 81. A pipe 82 extends from the lower end of the chamber 50 and has connected thereto the piping 83.

To the outer face of the rear wall of the casing 20 is bolteda bracket with the ring portion 90 and the arms 91, 92. The latter cage 94E'with the'ball 'bearings95'which are shown within the said hub "93. The cage 94 abuts with one edge against the sleeve"75..

A screw gland 96 with an annular groove 97 is in threaded engagement with thehub 935 A fibrous packing ring 98 is located in the A gland similar to 57 in the hub 106 issupportedon'the shaft- 55 and bears against a shoulder 116 of said shaft and wall 106 of the hub 106.- A ball bearing cage 117 with ball bearings 118 is secured to the shaft 55 and bears against the accompanying edge of the gland 115. A filler ring 120 is l'ocatedbetween' the ball'bearing cage'117 and the gland 115. A nut 121 on the shaft 55- bears against the cage 117. A cap 122 is bolted to the hub 106. A grease cup 123 is secured in an opening 1241 formed in the hub 106. r

A pipe 125 extends from the upper end of the chamber 108 and has extending therefrom the piping 126. A pipe 127 extends from the'lower end of'the chamber 108 and has extending therefrom the piping 128.

A gland 129 of Allen metal as described is supported on the shaft 55 in a cavity 130 in the hub 106.; A pin 131 extends from said shaft and engages the slot 132 in said gland 129. A;ring collar 133 is fastened to the hub 106 over the gland 129. A clearance of one thousandth of an inch is formed between the cylindrical surface of the gland 129 and cavity 130. A pair of impeller or turbine wheels are indicated in their entirety by the numerals 13 1 and 135. These Wheels are similar so one only will be described. The wheel has the boss 136 which is fastened to the shaft 55 and has extending therefrom the disk 136. Adjacent to the outer end of the disk are similar annular projections 137 and 137. A ring 138 is cast opposite the projections 137 and may be connected thereto by the connecting members-139. A ringl14 0 is cast opposite the projections and may be connected there-- to. the connecting-members 141. Spokes 142 connect the ring 1410'withthe hub 136.

Anouter row of curved buckets 145 with dovetailed ends preferably of steel or other suitable material are placed in the mold when the wheel is cast, between the projec- 1 tions 137 and the ring 138. An inner row of curved buckets 1416 similar to the buckets 145 is similarly located between the projections 137 and the ring 140.

To the annular' 111g 51 is secured the double annular frame with the members 151" and 152 "which are connected by the connecting braces 153. The frame 150 is bolted to the lug 51 by means of the boltsrfl54. With the frame 150 are cast the curved intern'iedia'te" stationary buckets 155 of steel or other suitable material and which are reversed to the buckets 145 and 1 16; -With the bonnet 105 is cast the annular lug 159 similar to 51. A double annular frame'160 similar to 150 is secured to the lug-"159 by means of the bolts similar to 1514. Steel buckets or the like sin'ii'lar to 155 are cast with the frame 160." I

Referring to Figs. 3 and 4, the turbine wheel is modified by the substitution ofone wheel for a pair of wheels iwithbueketswn its opposite fa'cesl In this instance the wheel or impeller is shown with the boss 172. Upon each of the flanges 17 0 islocated' a-ring 17 5, which. is dovetailed for a row of outer buckets 176 which areprerei-ably of steel or Other. suitable material and are placed in the mold when the ring is cast. At intervals plugs 177 project frointhe rings and bolts 178 clamp the said rings to the disk 169. Between the flanges 171;, 172 are supported rings 180simi1a'r to 175, with the buckets 18'6. Plugs 187 similar to 177 are secured in place means-of the bolts 188. To the rear wall'21 of theses 111,9; 20 of the modification and thel'bonnet' 105 are respectively connected the bucketsv 155 and 165 as already described. y V

An air duct 190 has extending therefrdm the lug 191. The latterisfbolted to the flange 4 6by means ofthe belt 192. Lugs are cast on the outer surface of the duct 190. Separator pipes 196 are located between the lugs 47- and the lugs 195' and bolts 198 extend through the pipes 196 and clamp the duct 190 inplace.

A fan wheel 200 is secured to the; shaft 55 by means of a nut 201 in the usual way;

To operate the turbine, the driving, fluid, in this instance steam, is admitted into'jthe piping38 through the inlet valve 41 From thence the fluid enters the valve chambers 26:

of the pairs of nozzle supports 24 mast.

lVith the opening of the valves 32 the 'fiui-d enters the nozzl'es 27, and from thence im} p nges against the outer; rows of curved buckets 145. Fromthe latter the fluid flows throughthe sta tionary intei rnediate reversedbuckets 155 The driving 'fiuldtheii impinges against in expansive eifect'of the driving fluid is uti- The its

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energy in the steam as it'leaves the outer rows of buckets 145 is utilized in the inner rows of buckets 1 16.

The glands 57 and 62, make efficient tight? joints between the hub of the impeller 135' and the ball bearing cage 68. The clear ances between the and by virtue of centrifugal force due to the rotation of said gland 57 water tight joints are maintained in said clearances. For a similar reason water tight joints are maintained between the gland 62- and spacing ring 70, between the gland 129 and the hub 106, between the gland 115 and hub 106.

Any moisture that may escape past the glands 57 and 62 is deposited into the exhaust or vacuum chamber 50. From the latter moisture is discharged by the piping 81 and 83, by virtue of the suction produced in said piping with the flow of air in the duct 190, caused by the rotations of the fan Wheel 200. Any moisture that may escape past the glands 115 and 129 is deposited into the exhaust or vacuum chamber 108 and from the latter is discharged by the piping .126 and 128 due to the effect of the rotations of the fanwheel 200. By the use of the glands as described the ordinary usual stufiin boxes for the shaft 55 of the turbine are 0 viated, and the roller bearings 69 and 118 of the shaft 55 are maintained moisture proof.

Havingdescribed my invention what I desire to secure by Letters Patent and claim is: 1. In a turbine the combination of a cas- 1ng an impeller in the casing, a stuffing box for the casing, a vacuum chamber for the stuffing box, a duct spaced from the vcasing,

piping leading from the stuifing box into said duct, a shaft for the impeller extending through the casing, the stufling box and into "the duct, and a fan wheel in the duct fastened to said shaft.

2. In a turbine the combination of a casmg, an impeller in the casing, a sleeve formed with the casing, a duct for the casing, a shaft for the impeller extending into the casing, through the sleeve and into the duct, a vacuum chamber formed in the sleeve extending to the shaft, a conduit extending from the vacuum chamber to said duct, a gland surrounding the shaft and turning therewith in the sleeve on each op- Oopies of this patent may be obtained for gland 57 and collar 60, collect any leakage of condensed moisture,

five cents each, by addressing the lized by flowing from the outer buckets, posite side of the chamber and a fan wheel through the stationary intermediate bucketsli; n thev duct fastened t0 the Shaftand then into the inner row of buckets. The

ing, an impeller 1n the casing, a sleeve formed with the casmg, bolts extending 3. In a turbine the combination of a casfrom the casing, a duct supported on the bolts, a shaft for the impeller extending through the casing, sleeve and into the duct,

a vacuum chamber formed in the sleeve extending to the shaft, a conduit extending from the vacuum chamber into the duct, a gland surrounding the shaft and turning therewith in the sleeve on each opposite side of the chamber and a clearance space between each gland and the sleeve to maintain portions of the fluid used 1n the turbine and which has been condensed in said clearance space, said condensed fluid being maintained in the clearance spaces by the centrifugal force due to the rotatlons of the impeller.

4:. In a device the combination of a casing having a sleeve formed therewlth, a bonnet for the casing having a sleeve formed therewith, a duct spaced from the casing, a shaft extending through the cas1ng, both of said sleeves and into the duct, an impeller in the casing and fastened to the shaft, a bearing in each of said sleeves for sald shaft, a vacuum chamber in each sleeve coacting with its accompanying bearing to maintaln the latter moisture proof, piping extendlng from the vacuum chamber into the duct and a fan wheel in the duct fastened to the shaft.

5. In a device the combination of a casing having a sleeve formed therewith, a bonnet for the casing having a sleeve formed therewith, a duct for the devlce, a shaft extending through the casing and both of said sleeves, an impeller in the caslng and fastened to the shaft, a vacuum chamber in each sleeve extending to said shaft, piping extending from said chambers to the duct, a pair of glands in each sleeve on opposite sides of its vacuum chamber, a bearing at the outer end of each sleeve for said shaft separated from its accompanying vacuum chamber by one of said glands and a fan wheel in said duct fastened to said shaft.

Signed at the borough of Manhattan 1n the county of New York and State of New York this 1st day of March, A. D. 1916.

CHARLES T. (JOE. Witnesses:

A. A. DE BONNEVILLE, RALPH E. SLAYTON.

"Commissioner of Eatents,

v v v Washington, D. 0. 

